Question

of a metallic cylinder pipe is 748 cm cube , it's length is 14cm and its external radius is 9cm, find it's thickness.​

Answer 1

${\huge {\mathfrak {Answer :-}}}$

External radius (R) = 9 cm.

Internal radius (r) = x cm.

Height (h) = 14 cm.

Volume (V) = 748 cu. cm .

➡️ We have,

$\implies$ V = $\pi$ × h (R^2 - r^2)

$\implies$ 748 = 22/7 × 14 × (9^2 - x^2)

$\implies$ 748/44 = 81 - x^2

$\implies$ x^2 = 81 - 17

$\implies$ x = 8

.°. Thickness = R - r = (9 - 8) cm = 1 cm.

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